The potential advantages and disadvantages of cement-retained implant crowns are reviewed, with a focus on complications related to residual excess cement. A series of 4 case reports illustrates the symptoms and treatment modalities associated with excess cement around implant crowns, and suggestions are offered for the prevention of such problems.
(Int J Oral Maxillofac Implants 1999;14:865–868)
Key words: cement-retained implant crowns, complications, excess cement

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